Attachment for electric-arc lamps



(No Model.)

J. A. MANNING. ATTACHMENT FOR ELECTRIC ARC LAMPS. No. 443,944. Patented Dec. 30, 1890.

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LII

UNITED STATES PATENT OFFICE.

JAMES A. MANNIXG, OF ASH'lABULA, OHIO.

ATTACHMENT FOR ELECTRIC-ARC LAMPS.

SPECIFICATION forming part of Letters Patent No. 443,944, dated December 30, 1890. Application filed September 24, 1890. Serial No. 366,043, (No model.

T0 to whom it may concern.-

Be it known that I, JAMES A. MANNING, a citizen of the United States, residing at Ashtabula,1ishtabula eoun ty,()hio, have invented a new and useful Attachment to Electric Lamps, of which the following is the specilication.

Figure l is a perspective view. Fig. 2 is a side elevation, and Fig. 2 a side elevation, one-half of a centering device being removed.

The holder to guide A, of approximately the shape of a double cone of insulating material-such as rubber is divided into two parts longitudinally, and each part is cut away at O to enable the band B of the rubber or other fusible or combustible material to assume a position near the touching ends of the carbons, and thus to burn away when the are is formed.

In operating the attachment the band is placed around the center of the bisected cone,

holding both parts closely together. It is then slipped over the lower carbon until the carbon point intersects the rubber band atthe center of the cone, the grooves of the cone pressing closely upon the carbon. The top carbon is allowed to drop freely through the upper section of the cone until in contact with the lower carbon and band, so that when the lamp is lighted the band is burned and the cone drops to the bottom of the lamp.

\Vhat I claim is A longitudinally-divided holder having a groove for the reception of the carbons, and a cut-away portion, in combination with a combustible or fusible band lying in the cut away portion and holding the parts of the holder together.

JAMES A. MANNING.

\Vitnesses:

CHAS. B. LEEK, A. N. BUTLER. 

